Title

Chair Gravity

Problem Scenario

I was wondering if the theory about this chair trick was true or not! I wanted to find out if the gender of a person controlled their gravity in any way. I had heard that it actually worked so I wanted to see.

Broad Question

Is it true that only girls can lift the chair?

Specific Question

Is it true that only girls can do the experiment without a problem, and that boys can only pick up the chair a little?

Hypothesis

I hypothesize that most girls will be able to do this, and some, to no boys can pick up the chair the right way.

Graph of Hypothesis

Variables

Independent Variable:

The gender of the tested people.

Dependent Variable:

Width between feet, Angle of the persons body lined up with the wall and chair.

Variables That Need To Be Controlled:

Having your feet the same width apart as the chair, keeping your knees straight, and staying flat-footed.

Vocabulary List That Needs Explanation

Angle; The space within two lines or three or more planes diverging froma common point, or within two planes diverging from a common line.
Theory; A coherent group of general propositions used as principles of explanation for a class of phenomena.

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General Plan

For my experiment I am tested the theory of the different gravities between boys and girls. First, I am going to put a chair against the wall. I will test girls first and then boys. What the students have to do is stand about 2 feet away from the wall or as far as the chair is away from the wall, with their feet spread the same width as the chair. put their head against the wall, a little above their hips, at almost a 90 degree angle. They have to lift the chair off the ground, with their head still on the wall, and then without bending their knees, stand up straight while still holding the chair. Then, I will right down how everyone did and find out if the theory is true or not.

Potential Problems And Solutions

Problem; Evereyone would be able to pick up the chair.
Solutions; I will test multiple people to make sure that the results vary.

Safety Or Environmental Concerns

Somebody could fall back onto the wall and hurt their head.

Experimental Design

(add the correct headings from the experimental design page before beginning)

Resources and Budget Table

Item	Number needed	Where I will get this	Cost
chair	1	science room	$0
student	22	class mates	$0

Detailed Procedure

1. Set up experiment in the hallway.
2. Have the person i am testing put there feet flat on the ground and the same width apart as the chair.
3. Have he/she put their head against the wall, at almost a 100 degree angle.
4. Then they have to try to lift the chair a little bit off the ground with their head still on the wall and flat-footed.
5.Next they have to stand up, still holding the chair, and without bending their knees.
6. Record data in science journal.

Diagram

Photo List

Time Line

Start date of experiment: March 15th, 2013. End date of experiment: March 20th, 2013

Data Table

Graphs/ Photos/Results
The results I got for my experiment were that the theory isn't completely true. My results show that more boys than girls couldn't do it correctly, but the theory is that no boys can do it and every girl can. That isn't what happened, because most boys could. That shows that the theory isn't completely true.
Conclusion
The end conclusion that I came to was that the chair theory isn't true. I thought that every girl I tested would be able to easily pick up the chair correctly. Not every girl could. I thought that no boys would not be able to at all, because I believed the theory. It turned out that most boys could and that only a few couldn't. In a way, the theory was partially right because more boys than girls couldn't do it. In order for the theory to be proven right though, no boys would be able to do this. To conclude this, the chair theory (pick up the chair with your head on the wall) is false and doesn't work out the right way.
Discussion
My experiment didn't turn out exactly how I expected it to. I thought that the chair theory was right and it wasn't, exactly. Most boys picked up the chair. I thought they wouldn't be able to, but since they did that proves it wrong. I would say that about 93% of the boys I tested did it correctly. About 98% of the girls could do the experiment correctly too. I think the theory would be true if it was testing something different then gender. It could work with different heights of people, and maybe even their age. All the people I tested were classmates from the seventh grade. Even though my experiment didn't end the way I thought it would, it was close to the correct theory, but not exact enough that it makes the theory true.
Benefits to the community or science
From this experiment we could learn the strength and different balance levels between boys and girls.
Background Research
The original chair theory is that if you put your head on the wall a little above the angle of your hips and with your feet spread to the same width as the chair, and try to lift the chair and then stand up with bending your knees, only girls are able to do this.
References

Abstract
In my experiment I was testing the flexibility, strength, and balance difference in both boys and girls. How I tested it was by using a chair. I tested every student in my class, with the same amount of boys and girls being tested. After I tested someone I would write in my science journal if they could do it or not. Some kids would be stuck with their head on the wall. While others had no problem standing up the right way. It was counted as wrong if the lifted their heels, bent their knees, or didn't pick the chair up off the floor a little before moving their head off the wall and standing up straight. If they did it wrimg the first time, I would have them try It one more time to make sure they couldn't do it. Before I started testing students I wrote my hypothesis that the theory would work and I made a chart to fil in after testing was done. Even though my hypothesis wasn't right, I found out that theory needed to be changed from something other then just gender. In the future, if I re-tested, I would test either height or age difference instead.